package com.changjiang.luban.utils.http;


import com.changjiang.luban.utils.SystemConstants;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

/**
 * 描述:cookie操作工具类
 * @author nichangjiang@vip.qq.com
 * 创建时间:2017/11/29. 16:05
 * 修改人:
 * 修改时间:
 * 修改备注:
 * 版本:v1.0
 */
public class CookieUtils {

    /**
     * 根据名字获取cookie
     * @param request
     * @param name cookie名字
     * @return
     */
    public static Cookie getCookieByName(HttpServletRequest request, String name){
        Map<String,Cookie> cookieMap = ReadCookieMap(request);
        if(cookieMap.containsKey(name)){
            Cookie cookie = (Cookie)cookieMap.get(name);
            return cookie;
        }else{
            return null;
        }
    }



    /**
     * 将cookie封装到Map里面
     * @param request
     * @return
     */
    private static Map<String,Cookie> ReadCookieMap(HttpServletRequest request){
        Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();
        Cookie[] cookies = request.getCookies();
        if(null!=cookies){
            for(Cookie cookie : cookies){
                cookieMap.put(cookie.getName(), cookie);
            }
        }
        return cookieMap;
    }

    /**
     * 保存Cookies
     * @param response
     * @param value 保存值
     * @author jxf
     */
    public static HttpServletResponse setCookie(HttpServletResponse response, String name, String value, int time) {
        // new一个Cookie对象,键值对为参数
        Cookie cookie = new Cookie(name, value);
        // tomcat下多应用共享
        cookie.setPath("/");
        // 如果cookie的值中含有中文时，需要对cookie进行编码，不然会产生乱码
        try {
            URLEncoder.encode(value, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        cookie.setMaxAge(time);
        // 将Cookie添加到Response中,使之生效
        response.addCookie(cookie);
        // addCookie后，如果已经存在相同名字的cookie，则最新的覆盖旧的cookie
        return response;
    }

    /**
     * cookie token信息
     * @param response
     * @param token 需要保存的token值
     * @return
     */
    public static HttpServletResponse setCookieToken(HttpServletResponse response, String token){
        Cookie cookie = new Cookie("accessToken", token);
        cookie.setPath("/");
        try {
            URLEncoder.encode(token, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        cookie.setMaxAge(SystemConstants.COOKIE_EXPIRATION_TIME);
        response.addCookie(cookie);
        return response;
    }


}
